Efect of Pre‑stretch Strain at High Temperatures on the Formability of AZ31 Magnesium Alloy Sheets

作     者：Yongqiao Li Lifei Wang Xiaohuan Pan Qiang Zhang Guangsheng Huang Bin Xing Weili Cheng Hongxia Wang Kwang Seon Shin Yongqiao Li;Lifei Wang;Xiaohuan Pan;Qiang Zhang;Guangsheng Huang;Bin Xing;Weili Cheng;Hongxia Wang;Kwang Seon Shin

作者机构：College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Chongqing Innovation Center of Industrial Big-Data Co.Ltd.National Engineering Laboratory for Industrial Big-Data Application TechnologyChongqing 400707China School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400044China Magnesium Technology Innovation CenterSchool of Materials Science and EngineeringSeoul National UniversitySeoul 881416Republic of Korea 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2023年第36卷第1期

页      面：48-60页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51704209,U1810208) the Central Government Guided Local Science and Technology Development Projects(No.YDZJSX2021A010) China Postdoctoral Science Foundation(No.2022M710541) the Projects of International Cooperation in Shanxi(No.201803D421086) the Shanxi Province Patent Promotion Implementation Fund(No.20200718) the Technological Innovation Programs of Higher Education Institutions in Shanxi(No.201802034) 

主　　题：High-temperature deformation Grain growth Magnesium alloys Texture Visco-plastic self-consistent modeling Formability 

摘      要：High-temperature pre-stretching experiments were carried out on the AZ31 Mg alloy at 723 K with strain levels of 2.54%,6.48%,10.92%,and 19.2%to alter the microstructure and texture for improving room-temperature *** results showed that the strain-hardening coefcient increased,while the Lankford value *** addition,the Erichsen values of all pre-stretch sheets were enhanced compared with that of the as-received *** maximum Erichsen value increased from 2.38 mm for the as-received sample to 4.03 mm for the 10.92%-stretched sample,corresponding to an improvement of 69.32%.This improvement was mainly attributed to the gradual increase in grain size,and the(0001)basal texture was weakened due to the activated non-basal slip as the high-temperature pre-stretching strain levels *** visco-plastic self-consistent analysis was performed on the as-received and high-temperature pre-stretched *** confrmed the higher activity of the prismatic slip in 10.92%-stretched sample,leading to divergence and weakening of basal texture *** results in an augmentation of the Schmid factor under diferent slip ***,it can be concluded that high-temperature pre-stretching technology provided an efective method to enhance the formability of Mg alloy sheets.